<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<style type="text/css">
			div {
				width: 296px;
				height: 180px;
				margin: 100px auto;
				position: relative;
				float: left;
				margin-right: 20px;
			}
			div:hover::before {
				content: "";
				width: 100%;
				height: 100%;
				border: 10px solid rgba(255, 255, 255, .3);
				display: block;
				position: absolute;
				top: 0;
				left: 0;
				box-sizing: border-box;
			}
		</style>
	</head>
	<body>
		<div>
			<img src="images/mi.jpg" >
		</div>
		<div>
			<img src="images/mi.jpg" >
		</div>
		<div>
			<img src="images/mi.jpg" >
		</div>
	</body>
</html>
